Familial adenomatous polyposis | Familial adenomatous polyposis

Familial adenomatous polyposis (FAP) is a rare, inherited condition caused by a defect in the adenomatous polyposis coli (APC) gene.Scheduleyourappointmentnowforsafein-personcare.Learnmore:MayoClinicfactsaboutcoronavirusdisease2019(COVID-19)Our COVID-19patient andvisitorguidelines,plustrustedhealthinformationLateston COVID-19vaccination bysite:ArizonapatientvaccinationupdatesArizona,FloridapatientvaccinationupdatesFlorida,RochesterpatientvaccinationupdatesRochesterandMayoClinicHealthSystempatientvaccinationupdatesMCHS​​SkiptositenavigationSkiptoContentThiscontentdoesnothaveanEnglishversion.ThiscontentdoesnothaveanArabicversion.SectionsforFamilialadenomatouspolyposisSymptoms&causesDiagnosis&treatmentDoctors&departmentsCareatMayoClinicPrintWe'rewelcomingpatientsatMayoClinicSeeoursafetyprecautionsinresponsetoCOVID-19.Requestanappointment.OverviewFamilialadenomatouspolyposis(FAP)isarare,inheritedconditioncausedbyadefectintheadenomatouspolyposiscoli(APC)gene.Mostpeopleinheritthegenefromaparent.Butfor25to30percentofpeople,thegeneticmutationoccursspontaneously.FAPcausesextratissue(polyps)toforminyourlargeintestine(colon)andrectum.Polypscanalsooccurintheuppergastrointestinaltract,especiallytheupperpartofyoursmallintestine(duodenum).Ifuntreated,thepolypsinthecolonandrectumarelikelytobecomecancerouswhenyouareinyour40s.Mostpeoplewithfamilialadenomatouspolyposiseventuallyneedsurgerytoremovethelargeintestinetopreventcancer.Thepolypsintheduodenumalsocandevelopcancer,buttheycanusuallybemanagedbycarefulmonitoringandbyremovingpolypsregularly.Somepeoplehaveamilderformofthecondition,calledattenuatedfamilialadenomatouspolyposis(AFAP).PeoplewithAFAPusuallyhavefewercolonpolyps(anaverageof30)anddevelopcancerlaterinlife.Products&ServicesBook:MayoClinicFamilyHealthBook,5thEditionNewsletter:MayoClinicHealthLetter—DigitalEditionShowmoreproductsfromMayoClinicSymptomsThemainsignofFAPishundredsoreventhousandsofpolypsgrowinginyourcolonandrectum,usuallystartingbyyourmid-teens.Thepolypsarenearly100


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